Add Tens
20 + 30 =
50
23 + 14 =
37
21 + 4 =
25
50 - 20 =
30
There are 20 pencils in a box and 10 on a desk. How many pencils are in all?
30 pencils
40 + 20 =
60
34 + 25 =
59
35 + 6 =
41
60 - 40 =
20
There are 50 books. 20 are taken away. How many are left?
30 books
50 + 30 =
80
46 + 39 =
85
48 + 7 =
55
70 - 30 =
40
A farmer picks 24 apples. Then he picks 15 more. How many apples are there now?
39 apples
60 + 40 =
100
58 + 28 =
86
68 + 9 =
77
80 - 20 =
60
There are 63 heart stickers and 19 smiley face stickers. How many stickers are in all?
82 stickers
70 + 50 =
120
65 + 38 =
103
79 + 9 =
88
90 - 40 =
50
Jada has 47 marbles. She gets 28 more. How many marbles does she have now?
75 marbles